Fastener for securing printing-plates to type-beds.



B. F. UPHAM. FASTENER FOR SECURING PRINTING PLATES TO TYPE BEDS. APPLIOATION FILED 1330.26, 1908.

921,753 Patented May 18, 1909.

UNITED sTATEs PATENT oFFion.

BURT F. UPHAM, OF BOSTON; MASSACHUSETTS.

FASTENER FOB SECURING PRINTING-PLATES TO TYPE-BEDS.

Application filed December 26, 1908. Serial No. $69,360.

, the following is aspecificatlon.

This invention relates to the construction of fasteners 01' catches for securing plates to the type beds or cylinders of printing presses. Its object has been to produce a very simple and inexpensive form of fastening, which is capable of exerting a strong hold upon the plates-and is easy both to attach, to release and to adjust" The nature of the invention is fully explained below, and also illustrated in the accompanying drawing, in which latter- Figure 1 is a plan of the type bed having a plate secured by my invention. Fig. 2 is a partial vertical section enlarged, on the line '22 of Fig. 1.- Figs. 3 and 4 areperspective views of the parts of the catch.

In said drawing, 5 represents the type bed i (or the surface of a type cylinder) to which an electrctype or other printing plate 6 has been attached by the use of my improved I catches. The bed or cylinder is provided with diagonal channels 7 having vertical side walls in the usual manner, to receive and enclined in the reverse directionas seen at 1 gage the catches. The latter consist of a top plate 8, a depending flange 9 integral with the depending plate, a nut 10, anda screw 11 passing through the plate and engaging the nut. The plate is triangular in shape, and at one edge 12 is beveled to fit the plate 6, as seen at Fi 2, and the flange 9 is arranged along anot er of its edges. Theouter face of the flange is vertical and its squarely against the wall of the channel 7 while its inner face is beveled or inclined to adapt it to coact with the nut in tightening the catch in the channel 7, one edge of the nut being also in- Specification of Letters Patent.

, Patented May 18, 1999.

Fig. 2. vertical and provided withhorizontal corrugations as shown so that when tightened, as stated below, it will have an increased grip upon the wall of the channel. Of course, it

that no tightening occurs until the wedging faces of the flange and nut are forced together by the screw. The top plate is drawn downward by the screw When the catch is to be secured in the bed, and the inclined opposing faces of the flange and nut then cause The-outer surface 14 of the nut is Wlll be understood that the'nut and flange can be entered freely in the channels, and

such an expansion of those devices as renders I the catch very tight and secure in the channel. The plate is also provided with a lip 13 on its under face so that it is adapted to fit the channels 7, and the catch is thus adapted to 'be'slid along the channels freely, a great convenience in positioning them.

It will be noted that my' catch is composed of only a few separate parts, and that it embraces no superfluous metal.

I claiin: i

The catch for securing electrotype or sirni lar lates adapted to be used in straight vertica sided channels in the bed, consisting of a top plate ing one edge beveled to fit the'printing plate, andalso having an integral flange depending from one ed e into the channel of the bed, such flange eing vertical on its outer side ,and wedging on its inner side, a nut having a .arrugated vertical outer face and a wedging inner face to oppose the wedging face of the flange, and a screw passing down through the top plate and engaging the nut, and adapted to force said wedging faces together and cause expansion against .the walls of the bed channel.

made triangular in shape, and hav- 

